# _*_ coding: UTF-8 _*_
# @Time     : 2021/10/28 13:54
# @Author   : Gong Yangyi
# @Site     : http://www.hzdledu.cn/
# @File     : c14s1_异常.py
# @Software : PyCharm

# 异常
# 异常是难以预知，在程序可能出现的错误，中断程序的运行
def foo1():
    for i in range(-2, 3):
        # if i == 0:
        #     print(f'错误')
        # else:
            print(50 / i)

#异常处理
#1.try-except
def foo2():
    for i in range(-2, 3):
        try:
            print(50/i)
        except Exception as e:
            print(e)

#2.try-except-else
def foo3():
    for i in range(-2, 3):
        try:
            print(50/i)
        except Exception as e:
            print(e)
        else:
            print('没有异常')
        print(f'------第{i}次循环-------------')

#3.try-except-else-finally
def foo4():
    for i in range(-2, 3):
        try:
            print(50/i)
        except Exception as e:
            print(e)
        else:
            print('没有异常')
        finally:
            print('不管有没有异常都要执行')
        print(f'------第{i}次循环-------------')

#raise抛出异常
def div(a,b):
    if b==0:
        raise ZeroDivisionError('除数为0')
    return a/b

def foo5():
    a=int(input('输入一个数；'))
    b= int(input('再输入一个数；'))
    try:
        print(div(a,b))
    except Exception as e:
        print(e)


if __name__ == '__main__':
    # foo1()
    # foo2()
    # foo3()
    # foo4()
    foo5()